Relevance of the complete Coulomb interaction matrix for the Kondo problem: Co impurities in Cu hosts

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Erscheinungsjahr:
2009
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Text
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  • The electronic structure of a prototype Kondo system, a cobalt impurity in a copper host is calculated, accurately taking into account correlation effects on the Co atom. Using the recently developed continuous-time Quantum Monte Carlo technique, it is possible to describe the Kondo resonance with a complete four-index Coulomb interaction matrix. We demonstrate that a standard practice of using a truncated Hubbard Hamiltonian to consider the Kondo physics can be inadequate. Using the full Coulomb vertex on Co, we study the qualitative dependence of the Kondo resonance on the local coordination. © 2009 The American Physical Society.
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  • info:eu-repo/semantics/closedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/6c68a41f-9df1-4c36-9d68-2fada375bb03